Citation:
Costa, J. P. , Wehbe, R. R. , Robb, J. , & Nacke, L. E. . (2013). ACM International Conference Proceeding Series. In Time's up: Studying leaderboards for engaging punctual behaviour. Retrieved from http://www.scopus.com/inward/record.url?eid=2-s2.0-84905507404&partnerID=MN8TOARS
